Someone help with these please ASAP I’m taking the test now

What happened right after the battle of concord ?

What happened as a result of the colonial victory at saratoga

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.